feat(editor): implement US-EDITOR-UX with global block selection, redesigned slash menu (favorites & preview), contextual placeholders, smart paste extended, turn into and undo/redo toasts

memento-note/lib/editor/turn-into-shortcut-extension.ts

@@ -0,0 +1,27 @@
+import { Extension } from '@tiptap/core'
+
+/**
+ * Extension TipTap qui permet de transformer instantanément le bloc sous le curseur
+ * en cyclant entre Titre 1, Titre 2, Titre 3 et Paragraphe normal via le raccourci clavier Cmd+Shift+H (ou Ctrl+Shift+H).
+ */
+export const TurnIntoShortcutExtension = Extension.create({
+  name: 'turnIntoShortcut',
+
+  addKeyboardShortcuts() {
+    return {
+      'Mod-Shift-h': () => {
+        const { editor } = this
+        
+        if (editor.isActive('heading', { level: 1 })) {
+          return editor.chain().focus().toggleHeading({ level: 2 }).run()
+        } else if (editor.isActive('heading', { level: 2 })) {
+          return editor.chain().focus().toggleHeading({ level: 3 }).run()
+        } else if (editor.isActive('heading', { level: 3 })) {
+          return editor.chain().focus().setParagraph().run()
+        } else {
+          return editor.chain().focus().toggleHeading({ level: 1 }).run()
+        }
+      },
+    }
+  },
+})